The windscreen washer system on the MGF and MG TF is a conventional electric pump arrangement: a plastic reservoir fed by a filler neck at the front of the engine bay, an electric pump drawing fluid from the reservoir, and a length of 4mm tubing carrying fluid to the pair of jets mounted on the bonnet. A non-return valve keeps the line full between uses, so the jets deliver fluid immediately when the switch is operated rather than cycling through empty tubing for a moment first. MGOC Spares covers the complete system, including original twin-nozzle and current single-nozzle jet variants, and two heated-jet options for winter use.
Reservoir, Cap and Grommet
The windscreen washer reservoir (ADU3906) is supplied complete with its cap (DMG10001, included in the reservoir assembly) and is a direct replacement for the original item. A mounting bracket is catalogued alongside. The washer pump seats into the reservoir through a rubber grommet (BAU2043A) which seals the pump body against the reservoir wall, the grommet is an often-overlooked service item that hardens over time and can allow slow fluid loss or pump air ingress, so a fresh grommet at any pump replacement is standard practice.
Electric Washer Pump
The electric washer pump (DMC100380) fits into the reservoir through the grommet and drives fluid through the tubing to the jets when the dashboard switch is operated. Pump failure typically presents as a buzzing sound with no fluid delivery, or silent failure with no response to the switch. Pump life is significantly extended by never running the pump dry, the commonest cause of premature failure is operating the washer switch when the reservoir is empty, which overheats the pump's internal motor winding within seconds. Topping up the reservoir at every fuel fill is a sensible habit.
Washer Tubing, Connectors and Non-Return Valve
The washer fluid runs through 4mm internal diameter black plastic tubing (GWW1148), sold by the metre. In-line connectors support the tubing routing: a tee piece (DNG10001) splits the feed between the two jets, an elbow connector (DNG10013) provides a 90-degree bend where the tubing enters the bonnet area, and a non-return valve (ADCU5037) keeps the upstream line full between uses. The non-return valve is a common source of sluggish washer performance, when it fails, fluid drains back to the reservoir between operations and the wipers cycle dry until the pump has re-primed the line. A fresh non-return valve is the first item to check when washer delivery is hesitant.
Tubing clips (YYC10037, four required) and edge clips (DYC101280, two required) retain the tubing along its run, with a tie wrap (BMK1900) securing the tubing at the bonnet crossover.
Washer Jets, Original Twin-Nozzle and Replacement Single-Nozzle
Two jet variants are catalogued. The original twin-nozzle jet assembly (DNC101190) delivers two streams of fluid per jet, giving broad coverage of the windscreen from each side.
The replacement single-nozzle jet (DNJ000380) is the current supply item and delivers a single fan of fluid from each position. Both variants use the same mounting position and the same jet-to-bonnet gasket (DNK10002). The single-nozzle replacement is a direct fit for the original twin-nozzle item, with no modification to the bonnet required, and most owners find the fan pattern from the replacement jet gives better overall screen coverage than the twin streams of the original.
Heated Washer Jet Options
Two heated washer jet options are catalogued for winter use. The factory MG Rover accessory kit (VUB100220) uses electrically heated jets with their own wiring loom, providing ice-free washer operation in the coldest conditions. The Tex Heat-n-Wash kit (F328) is an aftermarket alternative that uses engine coolant to heat the washer fluid before it reaches the jets, a simpler arrangement with no electrical loading, and one that also heats the washer fluid itself rather than just the jet nozzles. Either kit addresses the frustration of frozen jets on cold mornings, which tend to fail just when washer capability is most needed.
Ordering Considerations
For routine washer system maintenance, the most commonly ordered items are tubing (by the metre as needed), a non-return valve, a pump-to-reservoir grommet and a pair of single-nozzle replacement jets. These address the usual failure modes at low cost and restore a tired washer system to original performance. For complete rebuilds, the reservoir, pump, grommet, full length of tubing, non-return valve, tee piece, elbow connector and fresh jets together make a comprehensive refresh. Heated washer jets are a worthwhile upgrade for any owner using the car year-round, particularly in areas where frost is a regular winter occurrence.